int inc(const void*a,const void*b) {
    char ca=*(char*)a;
    char cb=*(char*)b;
    return ca-cb;
}
int main() {
    char t[]="147285963";
    qsort(t,strlen(t),1,inc);
    if(strcmp(t,"123456789")==0)
        puts("OK");
    char s[]="hello";
    char s1[]="lloeh";
    qsort(s,strlen(s),1,inc);
    puts(s);
    qsort(s1,strlen(s1),1,inc);
    puts(s1);
    printf("%d\n",strcmp(s,s1));
    return 0;
}
